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Background: Cadmium toxicity is an environmental health menace in developing countries, which can result in damage to the male reproductive system. The mechanisms of cadmium toxicity include an increase in lipid peroxidation, depletion of glutathione, reduction in protein-bound sulfhydryl groups, and increase of oxidative stress. Agnus castus has been differently reported for its strong antioxidant potential and reproductive-enhancing properties. These two properties make the plant viable for the possible amelioration of cadmium toxicity. Objectives: This study was carried out to investigate the effect of Agnus castus aqueous leaf extract on the testicular function indices in cadmium chloride-treated rats. Methods: Twenty-five male Wistar rats (100 - 160) g, Rattus norvegicus strain, were randomly distributed into five different groups, each containing five animals. The animals were grouped as follows. Group A (control group) received distilled water, and group B received 6.5 mg/kg body weight of cadmium chloride. Groups C, D, and E received 6.5 mg/kg body weight of cadmium chloride each together with 50 mg/kg, 100 mg/kg, and 200 mg/kg body weight of aqueous extract of Agnus castus, respectively. The administration was done by oral gavage, once daily for 21 days. The animals were finally sacrificed on day 22. The serum was collected, and the testis was excised for testicular function indices, hormonal assays, and antioxidant activities. Results: Exposure to cadmium chloride caused a significant reduction (P &lt; 0.05) in the weight of the testes and antioxidant enzymes (catalase, superoxide dismutase, and reduced glutathione) compared to the control group. However, co-treatment with cadmium chloride and Agnus castus leaves resulted in the amelioration of cadmium-induced reduction in testicular weight and antioxidant enzymes. Exposure to cadmium chloride caused a significant decrease in testosterone, follicle-stimulating hormone, and luteinizing hormone when compared to the control group. Co-treatment with cadmium chloride and Agnus castus increased the levels of glycogen, testosterone, follicle-stimulating hormone, and luteinizing hormone in the rats’ testes. Conclusions: The aqueous leaf extract of Agnus castus displayed a protective role in testicular function and antioxidants in Wistar rats against cadmium chloride toxicity, compared to control rats that received distilled water only.

Effect of Co-administration of Agnus castus Aqueous Leaf Extract and Cadmium Chloride on Testicular Function Indices